Pump assembly for internal combustion engines



Dec. 20, 1932. B EL N 1,891,392

PUMP ASSEMBLY FOR INTERNAL COMBUSTION ENGINES Filed July 22, 1931 2 Sheets-$heet 1 um A I W &

INVENTOR. flazmg "f #4 60/1, I

ATTORNEY.

PUMP ASSEMBLY FOR INTERNAL COMBUSTION ENGINES Filed July 22, 1951 2 Sheets-Sheet 2- o /7 57 I Z4 ii :1 I I 4 {Hi i 5 i l I INVENTOR. i 5 Harry I/Ye/sflfl. 1i 2:- BY

ATTORNEY.

Patented Dec. 20, 1932 UNITED STATES PATENT. OFFICE HARRY B. NELSON, OF SAGINAW, MICHIGAN, ASSIGNOR T NELSON BROTHERS COM} PANY, 0F SAGINAW, MICHIGAN,

A CORPORATION OF MICHIGAN PUMP ASSEMBLY FOR INTERNAL COMBUSTION ENGINES Application filed July 22,

One of the prime objects of the invention is to provide separate and independent fuel and oil pumps, which can be mounted as a unit, and provide means for simultaneously actuating said pumps. Y 7

Another object is to provide a spring retracted fuel pump and provide means for detachably engaging theoil pump, so that the mechanism for operating said fuel pump also simultaneously actuatestheoil pump.

A further object is to provide a plate having an oil splash pan assembly mounted thereon and including a feed pipe which communicates with said oil pump, so that the pumps and splash pan can be installed and removed as a unit and without disassembling the pumps.

A still further object is to provide a pump assembly'ofsimple and substantial construction, which is composed of a minimum number of parts, which is easy to manufacture and assemble, and which can be readily installed in the engine.

The above and otherobjects will appear as the specification progresses, reference being had to the accompanying drawings in which I have shown .thepreferred embodiment of my invention, and in which like reference numerals indicate like parts throughout the. several views thereof.

In the drawings:

Fig. 1 is a side elevation of an air cooled internal combustion engine equipped with my improved pump assembly.

Fig. 2 is a fragmentary part sectional side elevation illustrating the pumps and the pump actuating mechanism.

Fig. 3 is a transverse sectional elevation of the base illustrating the fuel pump.

Fig. 4: is a similar view illustrating the oil pump.

Fig. 5 is a top plan view of the engine base showing the oil and fuel compartments.

Fig. 6 is an enlarged side elevation of the pump assembly and oil pan.

Fig. 7 is a top plan view thereof.

Fig. 8 is a side view of the rod actuating members.

Fig. 9 is an edge view thereof.

As above stated this invention is directed 1931. Serial No. 552,382.

to the pump and splash pan assembly, and I do not deem it necessary to describe the engme and its operation in detail, excepting the pump assembly proper, and that portion of the mechanism which actuates said assembly. Referring now more particularly to the drawings, the numeral5 indicates the engine base to which the cylinder block 6 is secured by means of bolts 7, thisbase is hollow as shown, and is divided into compartments 8' and 9 respectively, and-into which the fuel and lubricating oil is introduced through the inlet openings 10 and 11. 3 A pump well 12 is provided directly adjacent the fuel compartment 8 and communicates therewith, a pump casing 13 being mounted therein, and a plunger 14 is mounted 1n said casing, a horizontally disposed bar 15 being secured to the upper end thereof, said plunger being normally held in raised position by means of a resilient spring 16 which is interposed between said bar 15 and the plate 17, said plate being secured to the en-' gine base and embraces the upper end of the casing. A feed line 18 opens to the fuel pump as shown, said line leadingto the engine carburetor 19 in the usual manner. I Y An oil splash pan 20 is also mounted on the plate 17, and a feed' pipe 21 communi cates therewith, thence leading downwardly and connecting to a similar well 22, which in turn communicates/with the oil chamber or compartment 9, a pump casing 23 being mounted in said well, the upper end being grooved as shown at 2L to accommodate. the plate 17. A pump plunger 25 is slidably mounted in said casing in the usual manner, theupper end being grooved as shown at 26 to accommodate the outer forked end 27 of the bar 15, and it will be clearly obvious that as the plunger 14 is actuated, that the plunger 24 will be simultaneously actuated.

V A gear 27 is provided on the crankshaft 28,

meshing with and driving a gear 29 which is journaled on the stud 30, a cam member 31 being formed in tegral with said gear.

A contact lever 32 is pivotally mounted on the side wall of the engine, the outer end of said lever engaging the top of the plunger 14, an actuating lever 33 being pivotally mounted on the pin 84: and is formed as clearly shown in Fig. 8 of the drawings, the end engaging the contact lever 32, so that as the cam is rotated, the actuating lever will engage the lever 32, forcing it downwardly, which in turn forces the plunger 14; and 25 downwardly, the spring 16 serving to force these plungers back to original position, thereby pumping fuel through the fuel line 18, to the carburetor 19, and oil into thesplash pan.

A contact member 35 is also mounted on the pin 34 and is formed as shown in Figs. 2 and 8, the head 36 being disposed in the path of travel of the cam 31, as is also the-head 37 provided on the actuating lever 33, valve rods 38 and 39 respectively project into the crank case and control the intake and exhaust valves, (not shown), so that as the cam 31 rotates, the heads 36 and 37 will be actuated and engage the ends of the rods 38 and 39 for opening and closing the valves.

Screws 40 serve to hold the plate 17 rigidly in position on the base, and by removal of these screws the splash pan, pumps and plate can be removed as a unit.

The segmental gear 41 and the lever 42 form a part of the engine starting mechanism, and forms no part of the present invention which is directed to the pump assemblies.

From the foregoing description it will be obvious that I have perfected a very simple, practical, and efficient pump actuating mechanism and mounting for internal combustion engines.

What I claim is 1. A pump assembly for internal combustion engines comprising spaced apart individual pumps, a horizontally disposed bar mounted on the upper end of one of the pump plungers and engaging the opposite plunger, means for intermittently engaging one of sald pump plungers for simultaneously actuating both pumps, and resilient means for forcing said plunger back to original position.

2. A pump assembly for internal combustion engines comprising spaced apart individual pumps, plungers slidably mounted therein, and detachably connected together for simultaneous operation thereof, resilient means for holding said plungers in raised position, and means engaging one of said plungers for intermittently actuating said plungers.

3. A pump assembly for internal combustion engines and comprising spaced apart individual pumps, a plate on which said pumps are mounted, a splash pan mounted thereon and connected to the oil pump, a horizontally disposed bar connecting the plungersof said pumps for simultaneous operation thereof, means for intermittently forcing said plungers downwardly, and re- 4. A pump assembly for internal combustion engines and comprising spaced apart individual pumps adapted to be connected to a source of supply, a plate on which said pumps are mounted as a unit, asplash pan mounted thereon and connected to one of said pumps, means for detachably connecting the pump plungers together for simultaneous operation thereof, a cam for forcing said plungers downwardly to pump fuel and lubricating oil respectively, and resilient means for forcing said plungers back to original position.

5. The combination with an internal combustion engine having a hollow base and provided with fuel and oil compartments respectively therein of a pump assembly mounted on said base and communicating with said compartments, and comprising individual pumps, a plate on which said pumps are mounted, means connecting the pump plungers for simultaneous operation thereof, means engaging one of said plungers for intermittently forcing said plungers downwardly and resilient means for forcing said plungers back to original position. i

6. The combination with an internal combustion engine having a hollow base, compartments in said base and adapted to contain oil and fuel respectively,a pump assembly comprising individual pumps communicating with said compartments and mounted on a plate as a unit, a splash pan mounted on the plate and a feed pipe co-nnected to one of said pumps, means detachably connecting the pump plungers for simultaneous operation thereof, means engaging one of said plungers for intermittently actuating said plungers and resident means for forcing said plungers back to original position.

In testimony'whereof I hereunto afiix my signature- HARRY. B. NELSON.

silient means for forcing said plungers back to original position. 

